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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 4-6 days






2. Animals which have only one estrous cycle (ex: dog - fox)






3. Start of the reproductive tract for the female. located outside of the body






4. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






5. 45-60 days after breeding; re-breed as required






6. Animals which have many estrous periods per year (ex: cow - sow)






7. Implies the amount of estrogen production






8. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






9. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






10. Microscopic - make sure not sterile - very few bulls are actually tested






11. Duct through penis that carries sperm and urine






12. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






13. The more stressed out the male is - the less sperm he is going to produce






14. Sperm is produced here






15. Prevent the cow from getting an infection from the calve






16. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






17. (switzerland) 2nd in size and milk production - most muscle -






18. Days which have decreasing daylight hours


19. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






20. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






21. (switzerland) 2nd in size and milk production - most muscle -






22. Front feet and head first. (except for hogs and dogs)






23. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.


24. Way to know everything is alright with the breeding male






25. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






26. Produce testosterone. located between the seminiferous tubules






27. 16-20 hours






28. 147 days






29. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






30. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






31. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






32. 16-20 hours






33. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






34. Check feet and legs - look for masculine traits in build such as crest and muscling






35. Animals which have only one estrous cycle (ex: dog - fox)






36. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






37. What about the sperm for a bull which has been castrated but still has testicles?






38. (LH) stimulates the Leydig cells to produce testosterone






39. Milk ~305 days - dry 60 days prior to calving






40. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






41. 114 days






42. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






43. 265-285 days






44. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






45. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






46. Birthing process (termination of gestation)






47. Prevent the cow from getting an infection from the calve






48. Depository for semen during insemination. where urine leaves the body






49. 19-23 (21) days






50. Microscopic - make sure not sterile - very few bulls are actually tested